Window wiper



March 31, 1931. w BRUGH 1,798,520

WINDOW WI PER Filed Aug. 8, 1928 2 Sheets-Sheet 1 INVENTOR WITNESS:ATTORNEY March 31, 1931.

G. w. BRUGH 1,798,520

WINDOW WIPER Filed Aug. 8, 1928 2 Sheets-Sheet 2 \na rllllllllllll u i,

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l ENTOR ATTORNEY memd'mu. 31, 1931 UNITED STATES PATENT; OFFICE enema w.seven, or seven nm nvmnu'a Application filed Auwt 8,19%. derial2%(898310.

This invention relates to a window wiper which is mainl designed forwiping widows of street cars, busses and other vehicles provided withair pressure, the general object of J, the invention being to provide acylinder containing two pistons which are connected together and thereciprocatory movement of which operates a wiper, with valve meansoperated by the reciprocatory movement of the 10 pistons for controllingthe flow of compressed air to the ends of the cylinder whereby thepistons are reciprocated by the compressed air. I

This invention also consists in certain other Eli features ofconstruction and in the combination and arrangement of the severalparts, to be hereinafter fully described, illustrated in theaccompanying drawings and specifically pointed out in the appendedclaim. In describing the invention in detail, reiterence will be had" tothe accompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure lis a view showing the device in use.

Figure 2 is a vertical sectional view t rough Fi ure 1.

igure 3 igure l is a longitudinal sectional view ough the cylinder.

'gure 5 is a section on line 5-5 of Figis a section on line 3-3 oiFigtired is a fragmentary elevation, showth e means for connecting thepiston rod he valve operating member. igure 7 is a sectional viewthrough the valve means, showing the parts in one position.

Figure 8 is a similar view, showing the parts in another position.

Figure 9 is a view of the dish connected with the valve shaft foroperating the valve.

Fi ure 10 is a view of the member operated y the movement of the disk.

Figure 11 is a view of the valve member.

In these views, the numeral 1 indicates a cylinder which is providedwith a bracket 2 which is adapted to besupported on a part of the windowor other transparent member which is to be wiped. A pair of pistons 3 isarranged in the cylinder and these pistons are connected together by therod 4, to the center of which a stub shaft 5 is connected, this shaftpassing through an elongated slot 6 filorrne in the c linder so that theshaft can move back and orth through the slot during the reciprocatorymovement of the pistons.

A shaft 7 is journaled in the body 8 which is formed with the lower artof the cylinder at the center thereof, and this shaft has attachedthereto a slotted arm 8, the slot of which receives the outer end of theshaft 5, so that the sliaft 7 will be rocked by the reciprocatorymovement of the pistons. This shaft passes through a part of the window,as shown in Figure 2, and the arm 9, which carries the'wiper'element 10is attached to the outer end of this shaft. is formed in the body 8 anda bushing 12 has one end threaded into the body, with its major portionbeing positioned in the chamber. The shaft passes through the bushingand has a non-circular and projecting therefrom. A disk 13 is fastenedto this non-circular end of the shaft so that the disk will move withthe shaft and said disk is notched on its periphery to form theshoulders 14.

A. valve -lorniin disk 15 is rotatably mounted on the bus ing and ispressed by a spring 16 against one wall of the chamber 11 in which isformed the two ports 17, each of which is connected with a port 18 ineach end of the cylinder by a passage 19 formed in the cylinder wall.Compressed air is supplied tothe chamber 11 from any suitable sourcethrough means of the tube 20, and said chamber is also provided with anexhaust port 21 which is in communication with an arc-shaped groove 22formed in one face of the valve member 15. This valve member is of twodiameters, as shown, to provide the shoulders 23 and the ports 21 and 17are so positioned that in one position of the valve member, one port 17will be uncovered while the other port 17 is covered by the shoulderedportion of the valve member so that this covered port 17 will be incommunication with the exhaust, port 21 through A valve chamber 11 painof oppositely arranged projections 24:,

one of which operates between-two stop pins 25 in the valve chamber,which limits themovement of the valve 'member, and the other projection24 is adapted to be engaged by the pair of angle arms 26 formed on asubstantially heart-shaped member 27 which is rotatably mounted on thebushing 12 between the disk 13 and a collar 28 on the bushing. Thismember 27 carries a pin 29 which is engaged by the shoulders 14 on thedisk 13, whereby the member 27 is rocked by the movement of the shaft 7through said disk and in turn, this member 27 will rock the valve member15 through means of its arms 26 engaging the projection 24 on the valvemember. The pointed part of said member 27 engages a spring pressed ball30 arranged in a recess 31 formed in a wall of the chamber 11, this ballacting to complete the movement of the member 27 and the valve 'member15 with a quick action after said member 27 has been initially moved bythe disk 17 engaging the pin 29, for as soon as the point moves beyondthe center of the ball, the pressure of the ball on the inclined edge ofthe member 27 wilff act to throw the member 27 over with a quick actionuntil it is sto flpoid by the second projection 24on the dis engagin oneof the stop pins 25. In or or to provide access to the parts, threadedplu s 32 are used to close the ends of the cylin er and openings in thevalve ghamber 11 and its recess 3 From-the foregoing it will be seenthat the flow of'compressed air into the ends of the cylinders iscontrolled by the valve member 15 which is operated from the shaft 7-through meansof the disk v13 and the member 27, and this shaft in turnis operated by the reciprocatory movement of the pistons andthe wiperarm is actuated by said'shaft.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that chan es may be made in the construction andin t e comm the scope-of the appended claim.

What I claim is I and pistons in the cylinder and connected to a wiper,'a'bushing carried by the cylinder I and extending into the chamber, ashaft journaled in t 0 cylinder and bushing, means connecting the shaftto the pistons, a notched operating disk fixedto the shaft in thechamlugs to limit the oscil at1on of the valve late, an intermediateplate journaled on the ushing adjacent the operating disk, a lug on saldintermediate plate to engage the notch of the operating disk, angularlugs on the intermediate plate to engage the other lug of the'valveplate, converg ng faces on said intermediate plate forming a pointedportion thereto, and a spring pressed ball in sald chamber 'to engagethe pointed portion and the inclined faces of the intermediate plate tothrow the intermediate plate over with a quick action.

In testimony whereof I aflix'm signature.-

- GEORGE W. RUGH.

A window wiper including a cylinder hav- I.

ing a compressed air valve chamber with passages in communication withthe cylinder

